SOURCE=ftp://ftp.lip6.fr/pub/linux/distributions/slackware/slackware64-current:OFFICIAL
SOURCE=http://mirrors.gnomeslackbuild.org/gsb/gsb64-3.0_slackware64-current
SOURCE=http://mirrors.gnomeslackbuild.org/gsb/gsb64-3.0_slackware64-current/extra:CUSTOM